64378255822 has 16 divisors (see below), whose sum is σ = 96765530112. Its totient is φ = 32123127960.

The previous prime is 64378255817. The next prime is 64378255829. The reversal of 64378255822 is 22855287346.

It is a self number, because there is not a number n which added to its sum of digits gives 64378255822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64378255829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2996643 + ... + 3018049.

It is an arithmetic number, because the mean of its divisors is an integer number (6047845632).

Almost surely, 2^64378255822 is an apocalyptic number.

64378255822 is a deficient number, since it is larger than the sum of its proper divisors (32387274290).

64378255822 is a wasteful number, since it uses less digits than its factorization.

64378255822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24423.

The product of its digits is 6451200, while the sum is 52.

The spelling of 64378255822 in words is "sixty-four billion, three hundred seventy-eight million, two hundred fifty-five thousand, eight hundred twenty-two".